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Synthesis, structure, and characterization of a silicotungstate anion-supported organic-inorganic hybrid complex [Zn(2,2′-Bipy)3]1.5[SiW12O40Zn(2,2′-Bipy)2(OH)] · 0.25H2O

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Abstract

A new Keggin-type silicotungstate anion-supported organic-inorganic hybrid transition metal complex, [Zn(Bipy)3]1.5[SiW12O40Zn(Bipy)2(OH)] · 0.25H2O (I) (Bipy = 2,2′-bipyridine), has been synthesized by the hydrothermal method and characterized by elemental analysis, IR, UV, and EPR spectra, TG-DTA analysis, and single crystal X-ray diffraction. The structural analysis indicates that each structural unit of I consists of one [SiW12O40Zn(Bipy)2(OH)]3− heteropolyanion, one and a half isolated [Zn(Bipy)3]2+ cations, and a quarter of crystal water molecule. The [Zn(Bipy)2(OH)]+ unit is covalently bonded to one Keggin polyoxoanion [SiW12O40]4− in the [SiW12O40Zn(Bipy)2(OH)]3− cluster. The EPR spectrum indicates the existence of Zn2+ with the high-spin state, and TG-DTA analysis exhibits that I has two steps of weight loss and the polyoxoanion framework is collapsed at 618°C.

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Authors and Affiliations

  1. Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, P. R. China

    G. Chen, H. Y. Niu, W. Wang, J. P. Wang & J. Y. Niu

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  1. G. Chen
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  2. H. Y. Niu
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  3. W. Wang
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  4. J. P. Wang
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  5. J. Y. Niu
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Correspondence to J. Y. Niu.

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Chen, G., Niu, H.Y., Wang, W. et al. Synthesis, structure, and characterization of a silicotungstate anion-supported organic-inorganic hybrid complex [Zn(2,2′-Bipy)3]1.5[SiW12O40Zn(2,2′-Bipy)2(OH)] · 0.25H2O. Russ J Coord Chem 36, 605–609 (2010). https://doi.org/10.1134/S1070328410080087

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  • DOI: https://doi.org/10.1134/S1070328410080087

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